This issue has been caused by a recent Windows Update, below are the steps to resolve it:

  • Leave the ‘Current Password’ field blank.
  • Enter a new password in both of the “New Password” fields.  Make sure to write it down.

The new password will now be required to login, however you can remove it via the below steps:

  • Open Windows Settings.
  • Click on Accounts.
  • Click on Sign-in options.
  • Under the “Manage how you sign in to your device” section, select the Password option.
  • Click the Change button.
  • Confirm your current account password.
  • Click the Next button.
  • Leave the “Password” and “Re-enter password” fields blank to remove the password entirely.
  • Click the Next button.
  • Click the Finish button.

Once you complete the steps, a password will no longer be required to access the Windows 10 desktop.